In general, it is an experiment that is run by different experimenters, using different-but-similar equipment, in a different locale, and perhaps a different-but-similar testing protocol.
Suggest a new hypothesis that could lead a different experiment
it means you made a mistake
a variable
all it is is the uncontrolled experiment is a little bit different
In general, it is an experiment that is run by different experimenters, using different-but-similar equipment, in a different locale, and perhaps a different-but-similar testing protocol.
Suggest a new hypothesis that could lead a different experiment
it means you made a mistake
The element of the experiment that the scientist changes in order to observe different outcomes.
a variable
all it is is the uncontrolled experiment is a little bit different
Because you can't be sure what about the variable is changing or how it changes. The different factors of the variable can also change the experiment in different ways, therefore making the experiment more complicated.
It depends, if you are doing an experiment on temperatures of water in nature, you will need it. If you are doing an experiment on how fast different species of turtles can walk, you don't.
Because the scientific method has to adapt to what the experiment is
Variables
Things that are kept from changing during an experiment are invariant.
The results of a science experiment do not have to match the original hypothesis. Indeed, the results collected in an experiment may be completely different to those that the scientist predicted.